In Boom™ Cards Valentine's Day Heart Subitize 0 to 10 Grades Kindergarten-2nd, learners identify the number of hearts by looking at the tens frame. ❤️ What teachers are saying!✔️ Shelly T. says, "Great resource. It was a great way to help them learn about numbers without counting them."❤️Subitizing is known to help math learners in developing number sense and the ability to perform mental math. ❤️Why use tens frames learning in math? ☀️Tens frames offer visuals to show the values of numbers